Sapphire and diamond coronet cluster. Centrally set with a cushion shape old cut natural unenhanced sapphire in an open back rubover setting with an approximate weight of 0.40 carats, encircled by ten round old cut diamonds in open back rubover and grain settings with a combined approximate weight of 0.30 carats, to an elegant coronet cluster design featuring millegrain edging, an intricately pierced gallery with swirling motifs and circular open backholing, flanked by inwardly tapering shoulders with intricate metalwork detail which taper through to a solid D-shape shank. Tested yellow gold and platinum, circa 1910.
